Coating composition for coated substrates and methods of making the same

Patent metadata

Field	Value
Publication number	US-9546300-B2
Application number	US-201313843213-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Sep 28, 2012
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A coating composition including a hydrophobic first aliphatic polyisocyanate, a second aliphatic polyisocyanate including a hydrophilic portion, a polyester polyol, a hydrophilic polyol, and a fluorinated polyol compound is disclosed. A coated substrate including a topcoat including the composition is also disclosed. Methods of forming the topcoat on a substrate are also disclosed.

First claim

What is claimed is:

1. A coating composition comprising:
a hydrophobic first aliphatic polyisocyanate;
a second aliphatic polyisocyanate comprising a hydrophilic portion;
a polyester polyol;
a hydrophilic polyol;
a fluorinated polyol, and
a fluorinated alcohol having one reactive functional group, wherein the one reactive functional group is one hydroxyl group.

2. The coating composition of claim 1 , wherein the second aliphatic polyisocyanate further comprises a hydrophobic portion.

3. The coating composition of claim 2 , wherein the hydrophobic portion of the second aliphatic polyisocyanate comprises an isophorone diisocyanate moiety or a derivative thereof.

4. The coating composition of claim 1 , wherein the hydrophilic portion of the second aliphatic polyisocyanate comprises a polyether chain.

5. The coating composition of claim 1 , wherein the second aliphatic polyisocyanate comprises a polyether chain bonded to an isophorone diisocyanate trimer.

6. The coating composition of claim 1 , wherein the hydrophobic first aliphatic polyisocyanate has an isocyanate functionality in a range of 3.0 to 4.2.

7. The coating composition of claim 1 , wherein the hydrophobic first aliphatic polyisocyanate is selected from the group consisting of biuret-based polyisocyanates, isocyanurate ring-based polyisocyanates, and combinations thereof.

8. The coating composition of claim 1 , wherein the polyester polyol comprises four hydroxyl groups.

9. The coating composition of claim 8 , wherein the polyester polyol comprises polycaprolactone having four polycaprolactone chains, and one of the four hydroxyl groups is at a terminal end of each polycaprolactone chain.

10. The coating composition of claim 1 , wherein the polyester polyol is a polycaprolactone polyol and/or a polycaprolactone diol.

11. The coating composition of claim 1 , further comprising a polyester diol.

12. The coating composition of claim 11 , wherein the polyester diol is a linear aliphatic dial having a first end comprising a hydroxyl group and a second end comprising a hydroxyl group.

13. The coating composition of claim 1 , wherein the fluorinated polyol comprises a backbone comprising alternating substituted or unsubstituted fluoroethylene and substituted or unsubstituted vinyl ether segments.

14. The coating composition of claim 1 , wherein the fluorinated alcohol comprises a perfluorinated carbon chain.

15. The coating composition of claim 14 , wherein the fluorinated alcohol further comprises a linking group between the perfluorinated carbon chain and the hydroxyl group.

16. The coating composition of claim 1 , further comprising an anti-static agent comprising a hydroxyl group, a UV absorber comprising a hydroxyl group, a migratory UV absorber, a migratory UV stabilizer, or a UV stabilizer comprising a hydroxyl group.

17. A coating formed from the coating composition of claim 1 .

18. A coated substrate comprising:
a substrate, and
the coating of claim 17 on the substrate.

19. The coated substrate of claim 18 , further comprising:
an electrically conductive multilayer stack between the substrate and the coating, the electrically conductive multilayer stack comprising:
first and second metal oxide layers comprising titanium oxide, the first metal oxide layer comprising a first region, a second region on the first region, and a third region on the second region, the first region and the third region each having a higher oxygen concentration than that of the second region; and
a metal layer between the first and second metal oxide layers.

20. The coating composition of claim 1 , wherein a weight ratio of the hydrophobic first aliphatic polyisocyanate to the second aliphatic polyisocyanate is in a range of about 95:5 to about 85:15.

21. The coating composition of claim 1 , wherein the fluorinated alcohol having one reactive functional group has a molecular weight of about 300 g/mole to about 400 g/mole.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Bimanand Alexander
• Uprety Krishna K
• Lakdawala Khushroo H

Classifications

• C23C28/322

  only coatings of metal elements only · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• Y10T428/31551

  Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.] · CPC title

• B64D7/00

  Arrangement of military equipment, e.g. armaments, armament accessories or military shielding, in aircraft; Adaptations of armament mountings for aircraft (dropping bombs or the like B64D1/00) · CPC title

• C09D175/06 Primary

  from polyesters · CPC title